A few weeks ahead of its release, Mr Trump tweeted that Mr Bornstein’s medical report would show “perfection”.

“I am fortunate to have been blessed with great genes,” Mr Trump, who became the oldest president to be elected in US history, wrote on Facebook at the time.

In January this year Mr Trump had a three-hour examination amid speculation over his mental health.

His White House doctor, Ronny Jackson, said at the time: “I have no concerns about his cognitive ability or neurological functions.”

The full text of the letter, as released: